The Perfect Core bra has always been my favorite sports bra. I have a small frame (5'1", 105lbs, B cup) and it's difficult to find a sports bra that fits AND offers good support for running. Unfortunately Lucy has made some changes and it's not as comfortable as my other Perfect Core bras. I've also find that it doesn't offer the same support. I would return it but I've already worn it for one run. I still love Lucy products but I won't be buying any more Core bras.